{"id":1096,"date":"2026-05-31T01:53:07","date_gmt":"2026-05-30T16:53:07","guid":{"rendered":"https:\/\/nangchang.nes.or.kr\/?p=1096"},"modified":"2026-05-31T01:53:07","modified_gmt":"2026-05-30T16:53:07","slug":"10%ed%8e%b8-%ed%94%84%eb%a1%9c%ed%86%a0%ec%bd%9c%ea%b3%bc-%ec%a0%9c%eb%84%a4%eb%a6%ad-swift%ec%9d%98-%eb%8b%a4%ed%98%95%ec%84%b1-1%eb%b6%80-%ec%99%84%ea%b2%b0","status":"publish","type":"post","link":"https:\/\/nangchang.nes.or.kr\/?p=1096","title":{"rendered":"[10\ud3b8] \ud504\ub85c\ud1a0\ucf5c\uacfc \uc81c\ub124\ub9ad \u2014 Swift\uc758 \ub2e4\ud615\uc131 (1\ubd80 \uc644\uacb0)"},"content":{"rendered":"
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\ud83e\udd16 \uc774 \uae00\uc740 Claude Code<\/a>(AI)\uac00 \uc791\uc131\ud569\ub2c8\ub2e4. | \uc2dc\ub9ac\uc988 \ubaa9\ucc28<\/a> | \uc774\uc804: 9\ud3b8<\/a><\/p>\n<\/blockquote>\n

1\ubd80\uc758 \ub9c8\uc9c0\ub9c9 \ud3b8\uc785\ub2c8\ub2e4. \ud504\ub85c\ud1a0\ucf5c\uacfc \uc81c\ub124\ub9ad\uc740 Swift\uc5d0\uc11c “\uc7ac\uc0ac\uc6a9 \uac00\ub2a5\ud55c \ucf54\ub4dc”\ub97c \ub9cc\ub4dc\ub294 \ub450 \ucd95\uc785\ub2c8\ub2e4. \ud074\ub798\uc2a4 \uc0c1\uc18d \uc5c6\uc774\ub3c4 \ub2e4\ud615\uc131\uc744 \uad6c\ud604\ud560 \uc218 \uc788\uace0, \ud0c0\uc785\uc744 \ubab0\ub77c\ub3c4 \ub3d9\uc791\ud558\ub294 \ud568\uc218\ub97c \ub9cc\ub4e4 \uc218 \uc788\uc2b5\ub2c8\ub2e4. Swift \ud45c\uc900 \ub77c\uc774\ube0c\ub7ec\ub9ac\uc640 SwiftUI \uc804\uccb4\uac00 \uc774 \ub450 \uac1c\ub150 \uc704\uc5d0\uc11c \ub3cc\uc544\uac11\ub2c8\ub2e4.<\/p>\n

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\ud504\ub85c\ud1a0\ucf5c\uc774\ub780<\/h2>\n

\ud504\ub85c\ud1a0\ucf5c\uc740 “\uc774 \ud0c0\uc785\uc740 \uc774\ub7f0 \uae30\ub2a5\uc744 \uac16\uace0 \uc788\ub2e4”\ub294 \uacc4\uc57d<\/strong>\uc785\ub2c8\ub2e4. Java\ub098 Kotlin\uc758 \uc778\ud130\ud398\uc774\uc2a4\uc640 \ube44\uc2b7\ud558\uc9c0\ub9cc, \uae30\ubcf8 \uad6c\ud604\uc744 \uc81c\uacf5\ud560 \uc218 \uc788\ub2e4\ub294 \uc810\uc5d0\uc11c \ub354 \uac15\ub825\ud569\ub2c8\ub2e4.<\/p>\n

protocol Greetable {\n    var name: String { get }\n    func greet() -> String\n}\n\nstruct User: Greetable {\n    var name: String\n\n    func greet() -> String {\n        return \"\uc548\ub155\ud558\uc138\uc694, \\(name)\uc785\ub2c8\ub2e4\"\n    }\n}\n\nstruct Bot: Greetable {\n    var name: String\n\n    func greet() -> String {\n        return \"\uc800\ub294 \ubd07 \\(name)\uc785\ub2c8\ub2e4\"\n    }\n}\n\nlet things: [any Greetable] = [User(name: \"\ucca0\uc218\"), Bot(name: \"Jarvis\")]\nfor thing in things {\n    print(thing.greet())\n}\n\/\/ \uc548\ub155\ud558\uc138\uc694, \ucca0\uc218\uc785\ub2c8\ub2e4\n\/\/ \uc800\ub294 \ubd07 Jarvis\uc785\ub2c8\ub2e4\n<\/code><\/pre>\n
\ud074\ub798\uc2a4\ubfd0 \uc544\ub2c8\ub77c \uad6c\uc870\uccb4\uc640 \uc5f4\uac70\ud615\ub3c4 \ud504\ub85c\ud1a0\ucf5c\uc744 \ucc44\ud0dd\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc774\uac83\uc774 Swift\uac00 \ud074\ub798\uc2a4 \uc0c1\uc18d\uc5d0 \ub35c \uc758\uc874\ud558\ub294 \uc774\uc720 \uc911 \ud558\ub098\uc785\ub2c8\ub2e4.<\/p>\n
\n
\ud504\ub85c\ud1a0\ucf5c \uc775\uc2a4\ud150\uc158 \u2014 \uae30\ubcf8 \uad6c\ud604 \uc81c\uacf5<\/h2>\n
\ud504\ub85c\ud1a0\ucf5c\uc5d0 \uae30\ubcf8 \uad6c\ud604\uc744 \ubd99\uc77c \uc218 \uc788\uc2b5\ub2c8\ub2e4. \ucc44\ud0dd\ud55c \ud0c0\uc785\uc774 \uad6c\ud604\ud558\uc9c0 \uc54a\uc73c\uba74 \uae30\ubcf8 \uad6c\ud604\uc774 \uc4f0\uc785\ub2c8\ub2e4.<\/p>\n
protocol Greetable {\n    var name: String { get }\n    func greet() -> String\n}\n\nextension Greetable {\n    func greet() -> String {       \/\/ \uae30\ubcf8 \uad6c\ud604\n        return \"\uc548\ub155\ud558\uc138\uc694, \\(name)\"\n    }\n}\n\nstruct Guest: Greetable {\n    var name: String\n    \/\/ greet()\ub97c \uad6c\ud604\ud558\uc9c0 \uc54a\uc544\ub3c4 \ub428 \u2014 \uae30\ubcf8 \uad6c\ud604 \uc0ac\uc6a9\n}\n\nprint(Guest(name: \"\ubc29\ubb38\uc790\").greet())  \/\/ \uc548\ub155\ud558\uc138\uc694, \ubc29\ubb38\uc790\n<\/code><\/pre>\n
\uc774 \ud328\ud134\uc744 \ud504\ub85c\ud1a0\ucf5c \uc9c0\ud5a5 \ud504\ub85c\uadf8\ub798\ubc0d(Protocol-Oriented Programming)<\/strong>\uc774\ub77c\uace0 \ubd80\ub985\ub2c8\ub2e4. \uacf5\ud1b5 \ub3d9\uc791\uc744 \ud074\ub798\uc2a4 \uacc4\uce35 \uc5c6\uc774 \ud504\ub85c\ud1a0\ucf5c \uc775\uc2a4\ud150\uc158\uc73c\ub85c \ubc30\ud3ec\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n
\n
\uc790\uc8fc \uc4f0\ub294 \ub0b4\uc7a5 \ud504\ub85c\ud1a0\ucf5c<\/h2>\n
Swift \ud45c\uc900 \ub77c\uc774\ube0c\ub7ec\ub9ac\ub294 \uc5ec\ub7ec \ud504\ub85c\ud1a0\ucf5c\uc744 \uc81c\uacf5\ud569\ub2c8\ub2e4. \uc9c1\uc811 \uad6c\ud604\ud558\uc9c0 \uc54a\uc544\ub3c4 Codable<\/code>\ucc98\ub7fc \ucef4\ud30c\uc77c\ub7ec\uac00 \uc790\ub3d9\uc73c\ub85c \ud569\uc131\ud574\uc8fc\ub294 \uac83\ub4e4\ub3c4 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n\n\n\n\n\n\n\n\n\n\n
\ud504\ub85c\ud1a0\ucf5c<\/th>\n\uc758\ubbf8<\/th>\n\uc790\ub3d9 \ud569\uc131<\/th>\n<\/tr>\n<\/thead>\n
Equatable<\/code><\/td>\n==<\/code>\ub85c \ub3d9\ub4f1 \ube44\uad50 \uac00\ub2a5<\/td>\n\uad6c\uc870\uccb4\u00b7enum\uc5d0\uc11c \uac00\ub2a5<\/td>\n<\/tr>\n
Comparable<\/code><\/td>\n<<\/code>, ><\/code> \ub4f1 \uc21c\uc11c \ube44\uad50 \uac00\ub2a5<\/td>\n\ubd80\ubd84 \uac00\ub2a5<\/td>\n<\/tr>\n
Hashable<\/code><\/td>\nDictionary \ud0a4, Set \uc6d0\uc18c\ub85c \uc0ac\uc6a9 \uac00\ub2a5<\/td>\n\uad6c\uc870\uccb4\u00b7enum\uc5d0\uc11c \uac00\ub2a5<\/td>\n<\/tr>\n
Codable<\/code><\/td>\nJSON \uc9c1\ub82c\ud654\u00b7\uc5ed\uc9c1\ub82c\ud654 \uac00\ub2a5<\/td>\n\ud504\ub85c\ud37c\ud2f0\uac00 \ubaa8\ub450 Codable\uc774\uba74 \uac00\ub2a5<\/td>\n<\/tr>\n
Identifiable<\/code><\/td>\n\uace0\uc720 id<\/code> \ud504\ub85c\ud37c\ud2f0 \ubcf4\uc720 (SwiftUI List\uc5d0\uc11c \uc0ac\uc6a9)<\/td>\n\uc5c6\uc74c<\/td>\n<\/tr>\n
CustomStringConvertible<\/code><\/td>\ndescription<\/code> \ud504\ub85c\ud37c\ud2f0\ub85c \ucd9c\ub825 \ud615\uc2dd \uc9c0\uc815<\/td>\n\uc5c6\uc74c<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
struct Point: Equatable, Hashable, CustomStringConvertible {\n    var x: Int\n    var y: Int\n\n    var description: String { \"(\\(x), \\(y))\" }\n}\n\nlet a = Point(x: 1, y: 2)\nlet b = Point(x: 1, y: 2)\n\nprint(a == b)         \/\/ true (Equatable \uc790\ub3d9 \ud569\uc131)\nprint(a)              \/\/ (1, 2) (CustomStringConvertible)\n\nvar visited: Set<Point> = [a, b]\nprint(visited.count)  \/\/ 1 (Hashable \u2014 \uc911\ubcf5 \uc81c\uac70)\n<\/code><\/pre>\n
\n
\uc81c\ub124\ub9ad \u2014 \ud0c0\uc785\uc744 \ubab0\ub77c\ub3c4 \ub3d9\uc791\ud558\ub294 \ucf54\ub4dc<\/h2>\n
\uc81c\ub124\ub9ad(generics)\uc744 \uc4f0\uba74 \ud2b9\uc815 \ud0c0\uc785\uc5d0 \ubb36\uc774\uc9c0 \uc54a\uace0 \uc5b4\ub5a4 \ud0c0\uc785\uc5d0\ub3c4 \ub3d9\uc791\ud558\ub294 \ud568\uc218\ub098 \ud0c0\uc785\uc744 \ub9cc\ub4e4 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n
\/\/ Int \uc804\uc6a9 swap\nfunc swapInts(_ a: inout Int, _ b: inout Int) {\n    let temp = a; a = b; b = temp\n}\n\n\/\/ \uc81c\ub124\ub9ad swap \u2014 \uc5b4\ub5a4 \ud0c0\uc785\uc5d0\ub3c4 \ub3d9\uc791\nfunc swap<T>(_ a: inout T, _ b: inout T) {\n    let temp = a; a = b; b = temp\n}\n\nvar x = 1, y = 2\nswap(&x, &y)\nprint(x, y)  \/\/ 2 1\n\nvar s1 = \"hello\", s2 = \"world\"\nswap(&s1, &s2)\nprint(s1, s2)  \/\/ world hello\n<\/code><\/pre>\n
T<\/code>\ub294 \ud0c0\uc785 \ud50c\ub808\uc774\uc2a4\ud640\ub354\uc785\ub2c8\ub2e4. \uc2e4\uc81c \ud638\ucd9c \uc2dc Swift\uac00 \uc778\uc790 \ud0c0\uc785\uc744 \ubcf4\uace0 T<\/code>\uac00 \ubb34\uc5c7\uc778\uc9c0 \ucd94\ub860\ud569\ub2c8\ub2e4.<\/p>\n
\uc81c\ub124\ub9ad \ud0c0\uc785\ub3c4 \ub9cc\ub4e4 \uc218 \uc788\uc2b5\ub2c8\ub2e4. Swift\uc758 Array<Element><\/code>\ub098 Dictionary<Key, Value><\/code>\uac00 \ubaa8\ub450 \uc81c\ub124\ub9ad \ud0c0\uc785\uc785\ub2c8\ub2e4.<\/p>\n
struct Stack<Element> {\n    private var items: [Element] = []\n\n    mutating func push(_ item: Element) { items.append(item) }\n    mutating func pop() -> Element? { items.popLast() }\n    var top: Element? { items.last }\n}\n\nvar intStack = Stack<Int>()\nintStack.push(1)\nintStack.push(2)\nprint(intStack.pop())  \/\/ Optional(2)\n\nvar stringStack = Stack<String>()\nstringStack.push(\"hello\")\n<\/code><\/pre>\n
\n
\ud0c0\uc785 \uc81c\uc57d \u2014 T\uc5d0 \uc870\uac74 \ubd99\uc774\uae30<\/h2>\n
\uc81c\ub124\ub9ad \ud0c0\uc785\uc5d0 \ud504\ub85c\ud1a0\ucf5c \uc870\uac74\uc744 \ubd99\uc774\uba74 \ud574\ub2f9 \ud504\ub85c\ud1a0\ucf5c\uc758 \uba54\uc11c\ub4dc\ub97c \ud568\uc218 \ub0b4\uc5d0\uc11c \uc4f8 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n
\/\/ T\uac00 Comparable\uc744 \ucc44\ud0dd\ud55c \uacbd\uc6b0\uc5d0\ub9cc \uc0ac\uc6a9 \uac00\ub2a5\nfunc largest<T: Comparable>(in array: [T]) -> T? {\n    guard !array.isEmpty else { return nil }\n    return array.max()\n}\n\nlargest(in: [3, 1, 4, 1, 5])   \/\/ Optional(5)\nlargest(in: [\"banana\", \"apple\", \"cherry\"])  \/\/ Optional(\"cherry\")\n<\/code><\/pre>\n
where<\/code>\ub85c \ub354 \ubcf5\uc7a1\ud55c \uc870\uac74\ub3c4 \ubd99\uc77c \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n
func merge<T>(_ a: [T], _ b: [T]) -> [T] where T: Equatable {\n    return a + b.filter { !a.contains($0) }\n}\n<\/code><\/pre>\n
\n
some\uacfc any \u2014 Swift 5.7\uc758 \ud0c0\uc785 \ud45c\ud604<\/h2>\n
\ud504\ub85c\ud1a0\ucf5c\uc744 \ud0c0\uc785\uc73c\ub85c \uc4f8 \ub54c \ub450 \ud0a4\uc6cc\ub4dc\uc758 \ucc28\uc774\ub97c \uc54c\uc544\uc57c \ud569\ub2c8\ub2e4.<\/p>\n
some<\/code> (\ubd88\ud22c\uba85 \ud0c0\uc785)<\/strong> \u2014 \ucef4\ud30c\uc77c \ud0c0\uc784\uc5d0 \ud558\ub098\uc758 \uad6c\uccb4\uc801\uc778 \ud0c0\uc785\uc73c\ub85c \uace0\uc815\ub429\ub2c8\ub2e4. \ud638\ucd9c\ud558\ub294 \ucabd\uc740 \uc815\ud655\ud55c \ud0c0\uc785\uc744 \ubab0\ub77c\ub3c4 \ub418\uc9c0\ub9cc, \ub9e4\ubc88 \uac19\uc740 \ud0c0\uc785\uc774 \ubc18\ud658\ub428\uc744 \ucef4\ud30c\uc77c\ub7ec\uac00 \uc54c\uace0 \ucd5c\uc801\ud654\ud569\ub2c8\ub2e4. SwiftUI\uc758 body: some View<\/code>\uac00 \ub300\ud45c\uc801\uc785\ub2c8\ub2e4.<\/p>\n
func makeShape() -> some Shape {\n    return Circle()  \/\/ \ud56d\uc0c1 Circle\uc744 \ubc18\ud658\n}\n<\/code><\/pre>\n
any<\/code> (\uc874\uc7ac \ud0c0\uc785)<\/strong> \u2014 \ub7f0\ud0c0\uc784\uc5d0 \uc5b4\ub5a4 \ud0c0\uc785\uc774\ub4e0 \ub2f4\uc744 \uc218 \uc788\ub294 \ubc15\uc2a4\uc785\ub2c8\ub2e4. \uc720\uc5f0\ud558\uc9c0\ub9cc \uc131\ub2a5 \ube44\uc6a9\uc774 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n
func describe(_ item: any Greetable) {\n    print(item.greet())  \/\/ \ub7f0\ud0c0\uc784\uc5d0 \ud0c0\uc785 \uacb0\uc815\n}\n<\/code><\/pre>\n
\uc9e7\uac8c \uc815\ub9ac\ud558\uba74: \ubc18\ud658 \ud0c0\uc785\uc774 \ud56d\uc0c1 \uac19\ub2e4\uba74 some<\/code>, \uc5ec\ub7ec \ud0c0\uc785\uc744 \ub2f4\uc544\uc57c \ud55c\ub2e4\uba74 any<\/code>.<\/p>\n
\n
\ub2e4\ub978 \uc5b8\uc5b4\uc640 \ube44\uad50<\/h2>\n\n\n\n\n\n\n\n\n\n
<\/th>\nJava \/ Kotlin<\/th>\nTypeScript<\/th>\nSwift<\/th>\n<\/tr>\n<\/thead>\n
\ud504\ub85c\ud1a0\ucf5c\/\uc778\ud130\ud398\uc774\uc2a4<\/td>\ninterface<\/code><\/td>\ninterface<\/code><\/td>\nprotocol<\/code><\/td>\n<\/tr>\n
\uae30\ubcf8 \uad6c\ud604<\/td>\nJava 8+ default<\/code><\/td>\n\uc5c6\uc74c<\/td>\n\ud504\ub85c\ud1a0\ucf5c \uc775\uc2a4\ud150\uc158<\/td>\n<\/tr>\n
\uad6c\uc870\uccb4 \ucc44\ud0dd<\/td>\n\ubd88\uac00 (\ud074\ub798\uc2a4\ub9cc)<\/td>\n\ubd88\uac00<\/td>\n\uac00\ub2a5<\/td>\n<\/tr>\n
\uc81c\ub124\ub9ad<\/td>\n<T><\/code><\/td>\n<T><\/code><\/td>\n<T><\/code><\/td>\n<\/tr>\n
\ud0c0\uc785 \uc81c\uc57d<\/td>\n<T extends Comparable><\/code><\/td>\n<T extends Comparable><\/code><\/td>\n<T: Comparable><\/code><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
\n
\ud575\uc2ec \uc694\uc57d<\/h2>\n